Hello-
I'm not much of a gardener but a friend left me with her favorite plant to take care of. She doesn't know what it is and neither do I. I want to make sure I take good care of it but I'm not sure about water and sunlight. Can anyone tell me what this is. The tops of the leaves are green with white spots; the undersides are red/purple. The drooping blooms are (were) a lovely pinky purple. The stem is thick and has rings on it. My friend says that it was several feet tall when she lived in New York, but has suffered since moving to Texas.

Any help with identification would be appreciated!